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libtdevnc/x11vnc/pointer.c

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/* -- pointer.c -- */
#include "x11vnc.h"
#include "xwrappers.h"
#include "keyboard.h"
#include "xinerama.h"
#include "xrecord.h"
#include "win_utils.h"
#include "cursor.h"
#include "userinput.h"
#include "connections.h"
#include "cleanup.h"
#include "unixpw.h"
int pointer_queued_sent = 0;
void initialize_pointer_map(char *pointer_remap);
void do_button_mask_change(int mask, int button);
void pointer(int mask, int x, int y, rfbClientPtr client);
void initialize_pipeinput(void);
int check_pipeinput(void);
static void buttonparse(int from, char **s);
static void update_x11_pointer_position(int x, int y);
static void update_x11_pointer_mask(int mask);
static void pipe_pointer(int mask, int x, int y, rfbClientPtr client);
/*
* pointer event (motion and button click) handling routines.
*/
typedef struct ptrremap {
KeySym keysym;
KeyCode keycode;
int end;
int button;
int down;
int up;
} prtremap_t;
#ifdef LIBVNCSERVER_HAVE_LIBPTHREAD
MUTEX(pointerMutex);
#endif
#define MAX_BUTTONS 5
#define MAX_BUTTON_EVENTS 50
static prtremap_t pointer_map[MAX_BUTTONS+1][MAX_BUTTON_EVENTS];
/*
* For parsing the -buttonmap sections, e.g. "4" or ":Up+Up+Up:"
*/
static void buttonparse(int from, char **s) {
char *q;
int to, i;
int modisdown[256];
q = *s;
for (i=0; i<256; i++) {
modisdown[i] = 0;
}
if (*q == ':') {
/* :sym1+sym2+...+symN: format */
int l = 0, n = 0;
char list[1000];
char *t, *kp = q + 1;
KeyCode kcode;
while (*(kp+l) != ':' && *(kp+l) != '\0') {
/* loop to the matching ':' */
l++;
if (l >= 1000) {
rfbLog("buttonparse: keysym list too long: "
"%s\n", q);
break;
}
}
*(kp+l) = '\0';
strncpy(list, kp, l);
list[l] = '\0';
rfbLog("remap button %d using \"%s\"\n", from, list);
/* loop over tokens separated by '+' */
t = strtok(list, "+");
while (t) {
KeySym ksym;
unsigned int ui;
int i;
if (n >= MAX_BUTTON_EVENTS - 20) {
rfbLog("buttonparse: too many button map "
"events: %s\n", list);
break;
}
if (sscanf(t, "0x%x", &ui) == 1) {
ksym = (KeySym) ui; /* hex value */
} else {
X_LOCK;
ksym = XStringToKeysym(t); /* string value */
X_UNLOCK;
}
if (ksym == NoSymbol) {
/* see if Button<N> "keysym" was used: */
if (sscanf(t, "Button%d", &i) == 1) {
rfbLog(" event %d: button %d\n",
from, n+1, i);
if (i == 0) i = -1; /* bah */
pointer_map[from][n].keysym = NoSymbol;
pointer_map[from][n].keycode = NoSymbol;
pointer_map[from][n].button = i;
pointer_map[from][n].end = 0;
pointer_map[from][n].down = 0;
pointer_map[from][n].up = 0;
} else {
rfbLog("buttonparse: ignoring unknown "
"keysym: %s\n", t);
n--;
}
} else {
/*
* XXX may not work with -modtweak or -xkb
*/
X_LOCK;
kcode = XKeysymToKeycode(dpy, ksym);
pointer_map[from][n].keysym = ksym;
pointer_map[from][n].keycode = kcode;
pointer_map[from][n].button = 0;
pointer_map[from][n].end = 0;
if (! ismodkey(ksym) ) {
/* do both down then up */
pointer_map[from][n].down = 1;
pointer_map[from][n].up = 1;
} else {
if (modisdown[kcode]) {
pointer_map[from][n].down = 0;
pointer_map[from][n].up = 1;
modisdown[kcode] = 0;
} else {
pointer_map[from][n].down = 1;
pointer_map[from][n].up = 0;
modisdown[kcode] = 1;
}
}
rfbLog(" event %d: keysym %s (0x%x) -> "
"keycode 0x%x down=%d up=%d\n", n+1,
XKeysymToString(ksym), ksym, kcode,
pointer_map[from][n].down,
pointer_map[from][n].up);
X_UNLOCK;
}
t = strtok(NULL, "+");
n++;
}
/* we must release any modifiers that are still down: */
for (i=0; i<256; i++) {
kcode = (KeyCode) i;
if (n >= MAX_BUTTON_EVENTS) {
rfbLog("buttonparse: too many button map "
"events: %s\n", list);
break;
}
if (modisdown[kcode]) {
pointer_map[from][n].keysym = NoSymbol;
pointer_map[from][n].keycode = kcode;
pointer_map[from][n].button = 0;
pointer_map[from][n].end = 0;
pointer_map[from][n].down = 0;
pointer_map[from][n].up = 1;
modisdown[kcode] = 0;
n++;
}
}
/* advance the source pointer position */
(*s) += l+2;
} else {
/* single digit format */
char str[2];
str[0] = *q;
str[1] = '\0';
to = atoi(str);
if (to < 1) {
rfbLog("skipping invalid remap button \"%d\" for button"
" %d from string \"%s\"\n",
to, from, str);
} else {
rfbLog("remap button %d using \"%s\"\n", from, str);
rfbLog(" button: %d -> %d\n", from, to);
pointer_map[from][0].keysym = NoSymbol;
pointer_map[from][0].keycode = NoSymbol;
pointer_map[from][0].button = to;
pointer_map[from][0].end = 0;
pointer_map[from][0].down = 0;
pointer_map[from][0].up = 0;
}
/* advance the source pointer position */
(*s)++;
}
}
/*
* process the -buttonmap string
*/
void initialize_pointer_map(char *pointer_remap) {
unsigned char map[MAX_BUTTONS];
int i, k;
/*
* This routine counts the number of pointer buttons on the X
* server (to avoid problems, even crashes, if a client has more
* buttons). And also initializes any pointer button remapping
* from -buttonmap option.
*/
X_LOCK;
num_buttons = XGetPointerMapping(dpy, map, MAX_BUTTONS);
X_UNLOCK;
if (num_buttons < 0) {
num_buttons = 0;
}
/* FIXME: should use info in map[] */
for (i=1; i<= MAX_BUTTONS; i++) {
for (k=0; k < MAX_BUTTON_EVENTS; k++) {
pointer_map[i][k].end = 1;
}
pointer_map[i][0].keysym = NoSymbol;
pointer_map[i][0].keycode = NoSymbol;
pointer_map[i][0].button = i;
pointer_map[i][0].end = 0;
pointer_map[i][0].down = 0;
pointer_map[i][0].up = 0;
}
if (pointer_remap && *pointer_remap != '\0') {
/* -buttonmap, format is like: 12-21=2 */
char *p, *q, *remap = strdup(pointer_remap);
int n;
if ((p = strchr(remap, '=')) != NULL) {
/* undocumented max button number */
n = atoi(p+1);
*p = '\0';
if (n < num_buttons || num_buttons == 0) {
num_buttons = n;
} else {
rfbLog("warning: increasing number of mouse "
"buttons from %d to %d\n", num_buttons, n);
num_buttons = n;
}
}
if ((q = strchr(remap, '-')) != NULL) {
/*
* The '-' separates the 'from' and 'to' lists,
* then it is kind of like tr(1).
*/
char str[2];
int from;
rfbLog("remapping pointer buttons using string:\n");
rfbLog(" \"%s\"\n", remap);
p = remap;
q++;
i = 0;
str[1] = '\0';
while (*p != '-') {
str[0] = *p;
from = atoi(str);
buttonparse(from, &q);
p++;
}
}
free(remap);
}
}
/*
* Send a pointer position event to the X server.
*/
static void update_x11_pointer_position(int x, int y) {
int rc;
if (raw_fb && ! dpy) return; /* raw_fb hack */
X_LOCK;
if (use_xwarppointer) {
/*
* off_x and off_y not needed with XWarpPointer since
* window is used:
*/
XWarpPointer(dpy, None, window, 0, 0, 0, 0, x + coff_x,
y + coff_y);
} else {
XTestFakeMotionEvent_wr(dpy, scr, x + off_x + coff_x,
y + off_y + coff_y, CurrentTime);
}
X_UNLOCK;
if (cursor_x != x || cursor_y != y) {
last_pointer_motion_time = dnow();
}
cursor_x = x;
cursor_y = y;
/* record the x, y position for the rfb screen as well. */
cursor_position(x, y);
/* change the cursor shape if necessary */
rc = set_cursor(x, y, get_which_cursor());
cursor_changes += rc;
last_event = last_input = last_pointer_input = time(0);
}
void do_button_mask_change(int mask, int button) {
int mb, k, i = button-1;
/*
* this expands to any pointer_map button -> keystrokes
* remappings. Usually just k=0 and we send one button event.
*/
for (k=0; k < MAX_BUTTON_EVENTS; k++) {
int bmask = (mask & (1<<i));
if (pointer_map[i+1][k].end) {
break;
}
if (pointer_map[i+1][k].button) {
/* send button up or down */
mb = pointer_map[i+1][k].button;
if ((num_buttons && mb > num_buttons) || mb < 1) {
rfbLog("ignoring mouse button out of "
"bounds: %d>%d mask: 0x%x -> 0x%x\n",
mb, num_buttons, button_mask, mask);
continue;
}
if (debug_pointer) {
rfbLog("pointer(): sending button %d"
" %s (event %d)\n", mb, bmask
? "down" : "up", k+1);
}
XTestFakeButtonEvent_wr(dpy, mb, (mask & (1<<i))
? True : False, CurrentTime);
} else {
/* send keysym up or down */
KeyCode key = pointer_map[i+1][k].keycode;
int up = pointer_map[i+1][k].up;
int down = pointer_map[i+1][k].down;
if (! bmask) {
/* do not send keysym on button up */
continue;
}
if (debug_pointer) {
rfbLog("pointer(): sending button %d "
"down as keycode 0x%x (event %d)\n",
i+1, key, k+1);
rfbLog(" down=%d up=%d "
"keysym: %s\n", down, up,
XKeysymToString(XKeycodeToKeysym(
dpy, key, 0)));
}
if (down) {
XTestFakeKeyEvent_wr(dpy, key, True,
CurrentTime);
}
if (up) {
XTestFakeKeyEvent_wr(dpy, key, False,
CurrentTime);
}
}
}
}
/*
* Send a pointer button event to the X server.
*/
static void update_x11_pointer_mask(int mask) {
int snapped = 0, xr_mouse = 1, i;
last_event = last_input = last_pointer_input = time(0);
if (raw_fb && ! dpy) return; /* raw_fb hack */
if (mask != button_mask) {
last_pointer_click_time = dnow();
}
if (nofb) {
xr_mouse = 0;
} else if (!strcmp(scroll_copyrect, "never")) {
xr_mouse = 0;
} else if (!strcmp(scroll_copyrect, "keys")) {
xr_mouse = 0;
} else if (skip_cr_when_scaling("scroll")) {
xr_mouse = 0;
} else if (xrecord_skip_button(mask, button_mask)) {
xr_mouse = 0;
}
if (mask && use_xrecord && ! xrecording && xr_mouse) {
static int px, py, x, y, w, h, got_wm_frame;
static XWindowAttributes attr;
Window frame = None, mwin = None;
int skip = 0;
if (!button_mask) {
X_LOCK;
if (get_wm_frame_pos(&px, &py, &x, &y, &w, &h,
&frame, &mwin)) {
got_wm_frame = 1;
if (debug_scroll > 1) fprintf(stderr, "wm_win: 0x%lx\n", mwin);
if (mwin != None) {
if (!valid_window(mwin, &attr, 1)) {
mwin = None;
}
}
} else {
got_wm_frame = 0;
}
X_UNLOCK;
}
if (got_wm_frame) {
if (wireframe && near_wm_edge(x, y, w, h, px, py)) {
/* step out of wireframe's way */
skip = 1;
} else {
int ok = 0;
int btn4 = (1<<3);
int btn5 = (1<<4);
if (near_scrollbar_edge(x, y, w, h, px, py)) {
ok = 1;
}
if (mask & (btn4|btn5)) {
/* scroll wheel mouse */
ok = 1;
}
if (mwin != None) {
/* skinny internal window */
int w = attr.width;
int h = attr.height;
if (h > 10 * w || w > 10 * h) {
if (debug_scroll > 1) fprintf(stderr, "internal scrollbar: %dx%d\n", w, h);
ok = 1;
}
}
if (! ok) {
skip = 1;
}
}
}
if (! skip) {
xrecord_watch(1, SCR_MOUSE);
snapshot_stack_list(0, 0.50);
snapped = 1;
if (button_mask) {
xrecord_set_by_mouse = 1;
} else {
update_stack_list();
xrecord_set_by_mouse = 2;
}
}
}
if (mask && !button_mask) {
/* button down, snapshot the stacking list before flushing */
if (wireframe && !wireframe_in_progress &&
strcmp(wireframe_copyrect, "never")) {
if (! snapped) {
snapshot_stack_list(0, 0.0);
}
}
}
X_LOCK;
/* look for buttons that have be clicked or released: */
for (i=0; i < MAX_BUTTONS; i++) {
if ( (button_mask & (1<<i)) != (mask & (1<<i)) ) {
if (debug_pointer) {
rfbLog("pointer(): mask change: mask: 0x%x -> "
"0x%x button: %d\n", button_mask, mask,i+1);
}
do_button_mask_change(mask, i+1); /* button # is i+1 */
}
}
X_UNLOCK;
/*
* Remember the button state for next time and also for the
* -nodragging case:
*/
button_mask_prev = button_mask;
button_mask = mask;
}
/* for -pipeinput */
static void pipe_pointer(int mask, int x, int y, rfbClientPtr client) {
int can_input = 0, uid;
allowed_input_t input;
ClientData *cd = (ClientData *) client->clientData;
char hint[MAX_BUTTONS * 20];
if (pipeinput_fh == NULL) {
return;
}
if (! view_only) {
get_allowed_input(client, &input);
if (input.motion || input.button) {
can_input = 1; /* XXX distinguish later */
}
}
uid = cd->uid;
if (! can_input) {
uid = -uid;
}
hint[0] = '\0';
if (mask == button_mask) {
strcat(hint, "None");
} else {
int i, old, new, m = 1, cnt = 0;
for (i=0; i<MAX_BUTTONS; i++) {
char s[20];
old = button_mask & m;
new = mask & m;
m = m << 1;
if (old == new) {
continue;
}
if (hint[0] != '\0') {
strcat(hint, ",");
}
if (new && ! old) {
sprintf(s, "ButtonPress-%d", i+1);
cnt++;
} else if (! new && old) {
sprintf(s, "ButtonRelease-%d", i+1);
cnt++;
}
strcat(hint, s);
}
if (! cnt) {
strcpy(hint, "None");
}
}
fprintf(pipeinput_fh, "Pointer %d %d %d %d %s\n", uid, x, y,
mask, hint);
fflush(pipeinput_fh);
check_pipeinput();
}
/*
* Actual callback from libvncserver when it gets a pointer event.
* This may queue pointer events rather than sending them immediately
* to the X server. (see update_x11_pointer*())
*/
void pointer(int mask, int x, int y, rfbClientPtr client) {
allowed_input_t input;
int sent = 0, buffer_it = 0;
double now;
if (mask >= 0) {
got_pointer_calls++;
}
if (debug_pointer && mask >= 0) {
static int show_motion = -1;
static double last_pointer = 0.0;
double tnow, dt;
static int last_x, last_y;
if (show_motion == -1) {
if (getenv("X11VNC_DB_NOMOTION")) {
show_motion = 0;
} else {
show_motion = 1;
}
}
dtime0(&tnow);
tnow -= x11vnc_start;
dt = tnow - last_pointer;
last_pointer = tnow;
if (show_motion) {
rfbLog("# pointer(mask: 0x%x, x:%4d, y:%4d) "
"dx: %3d dy: %3d dt: %.4f t: %.4f\n", mask, x, y,
x - last_x, y - last_y, dt, tnow);
}
last_x = x;
last_y = y;
}
if (mask >= 0 && unixpw && unixpw_in_progress) {
return;
}
if (scaling) {
/* map from rfb size to X11 size: */
x = ((double) x / scaled_x) * dpy_x;
x = nfix(x, dpy_x);
y = ((double) y / scaled_y) * dpy_y;
y = nfix(y, dpy_y);
}
if (pipeinput_fh != NULL && mask >= 0) {
pipe_pointer(mask, x, y, client);
if (! pipeinput_tee) {
if (! view_only || raw_fb) { /* raw_fb hack */
got_user_input++;
got_keyboard_input++;
last_pointer_client = client;
}
if (view_only && raw_fb) {
/* raw_fb hack track button state */
button_mask_prev = button_mask;
button_mask = mask;
}
return;
}
}
if (view_only) {
return;
}
now = dnow();
if (mask >= 0) {
/*
* mask = -1 is a special case call from scan_for_updates()
* to flush the event queue; there is no real pointer event.
*/
get_allowed_input(client, &input);
if (! input.motion && ! input.button) {
return;
}
got_user_input++;
got_pointer_input++;
last_pointer_client = client;
last_pointer_time = now;
if (blackout_ptr && blackouts) {
int b, ok = 1;
/* see if it goes into the blacked out region */
for (b=0; b < blackouts; b++) {
if (x < blackr[b].x1 || x > blackr[b].x2) {
continue;
}
if (y < blackr[b].y1 || y > blackr[b].y2) {
continue;
}
/* x1 <= x <= x2 and y1 <= y <= y2 */
ok = 0;
break;
}
if (! ok) {
if (debug_pointer) {
rfbLog("pointer(): blackout_ptr skipping "
"x=%d y=%d in rectangle %d,%d %d,%d\n", x, y,
blackr[b].x1, blackr[b].y1,
blackr[b].x2, blackr[b].y2);
}
return;
}
}
}
/*
* The following is hopefully an improvement wrt response during
* pointer user input (window drags) for the threaded case.
* See check_user_input() for the more complicated things we do
* in the non-threaded case.
*/
if ((use_threads && pointer_mode != 1) || pointer_flush_delay > 0.0) {
# define NEV 32
/* storage for the event queue */
static int mutex_init = 0;
static int nevents = 0;
static int ev[NEV][3];
int i;
/* timer things */
static double dt = 0.0, tmr = 0.0, maxwait = 0.4;
if (! mutex_init) {
INIT_MUTEX(pointerMutex);
mutex_init = 1;
}
if (pointer_flush_delay > 0.0) {
maxwait = pointer_flush_delay;
}
if (mask >= 0) {
if (fb_copy_in_progress || pointer_flush_delay > 0.0) {
buffer_it = 1;
}
}
LOCK(pointerMutex);
/*
* If the framebuffer is being copied in another thread
* (scan_for_updates()), we will queue up to 32 pointer
* events for later. The idea is by delaying these input
* events, the screen is less likely to change during the
* copying period, and so will give rise to less window
* "tearing".
*
* Tearing is not completely eliminated because we do
* not suspend work in the other libvncserver threads.
* Maybe that is a possibility with a mutex...
*/
if (buffer_it) {
/*
* mask = -1 is an all-clear signal from
* scan_for_updates().
*
* dt is a timer in seconds; we only queue for so long.
*/
dt += dtime(&tmr);
if (nevents < NEV && dt < maxwait) {
i = nevents++;
ev[i][0] = mask;
ev[i][1] = x;
ev[i][2] = y;
if (! input.button) {
ev[i][0] = -1;
}
if (! input.motion) {
ev[i][1] = -1;
ev[i][2] = -1;
}
UNLOCK(pointerMutex);
if (debug_pointer) {
rfbLog("pointer(): deferring event %d"
" %.4f\n", i, tmr - x11vnc_start);
}
return;
}
}
/* time to send the queue */
for (i=0; i<nevents; i++) {
int sent = 0;
if (mask < 0 && client != NULL) {
/* hack to only push the latest event */
if (i < nevents - 1) {
if (debug_pointer) {
rfbLog("- skip deferred event:"
" %d\n", i);
}
continue;
}
}
if (debug_pointer) {
rfbLog("pointer(): sending event %d %.4f\n",
i+1, dnow() - x11vnc_start);
}
if (ev[i][1] >= 0) {
update_x11_pointer_position(ev[i][1], ev[i][2]);
sent = 1;
}
if (ev[i][0] >= 0) {
update_x11_pointer_mask(ev[i][0]);
sent = 1;
}
if (sent) {
pointer_queued_sent++;
}
}
if (nevents && dt > maxwait) {
if (dpy) { /* raw_fb hack */
if (mask < 0) {
if (debug_pointer) {
rfbLog("pointer(): calling XFlush "
"%.4f\n", dnow() - x11vnc_start);
}
X_LOCK;
XFlush(dpy);
X_UNLOCK;
}
}
}
nevents = 0; /* reset everything */
dt = 0.0;
dtime0(&tmr);
UNLOCK(pointerMutex);
}
if (mask < 0) { /* -1 just means flush the event queue */
if (debug_pointer) {
rfbLog("pointer(): flush only. %.4f\n",
dnow() - x11vnc_start);
}
return;
}
/* update the X display with the event: */
if (input.motion) {
update_x11_pointer_position(x, y);
sent = 1;
}
if (input.button) {
if (mask != button_mask) {
button_change_x = cursor_x;
button_change_y = cursor_y;
}
update_x11_pointer_mask(mask);
sent = 1;
}
if (nofb && sent) {
/*
* nofb is for, e.g. Win2VNC, where fastest pointer
* updates are desired.
*/
X_LOCK;
XFlush(dpy);
X_UNLOCK;
} else if (buffer_it) {
if (debug_pointer) {
rfbLog("pointer(): calling XFlush+"
"%.4f\n", dnow() - x11vnc_start);
}
X_LOCK;
XFlush(dpy);
X_UNLOCK;
}
}
void initialize_pipeinput(void) {
char *p;
if (pipeinput_fh != NULL) {
rfbLog("closing pipeinput stream: %p\n", pipeinput_fh);
pclose(pipeinput_fh);
pipeinput_fh = NULL;
}
pipeinput_tee = 0;
if (pipeinput_opts) {
free(pipeinput_opts);
pipeinput_opts = NULL;
}
if (! pipeinput_str) {
return;
}
/* look for options: tee, reopen, ... */
p = strchr(pipeinput_str, ':');
if (p != NULL) {
char *str, *opt, *q;
int got = 0;
*p = '\0';
str = strdup(pipeinput_str);
opt = strdup(pipeinput_str);
*p = ':';
q = strtok(str, ",");
while (q) {
if (!strcmp(q, "key") || !strcmp(q, "keycodes")) {
got = 1;
}
if (!strcmp(q, "reopen")) {
got = 1;
}
if (!strcmp(q, "tee")) {
pipeinput_tee = 1;
got = 1;
}
q = strtok(NULL, ",");
}
if (got) {
pipeinput_opts = opt;
} else {
free(opt);
}
free(str);
p++;
} else {
p = pipeinput_str;
}
set_child_info();
if (no_external_cmds) {
rfbLogEnable(1);
rfbLog("cannot run external commands in -nocmds mode:\n");
rfbLog(" \"%s\"\n", p);
rfbLog(" exiting.\n");
clean_up_exit(1);
}
rfbLog("pipeinput: starting: \"%s\"...\n", p);
pipeinput_fh = popen(p, "w");
if (! pipeinput_fh) {
rfbLog("popen(\"%s\", \"w\") failed.\n", p);
rfbLogPerror("popen");
rfbLog("Disabling -pipeinput mode.\n");
return;
}
fprintf(pipeinput_fh, "%s",
"# \n"
"# Format of the -pipeinput stream:\n"
"# --------------------------------\n"
"#\n"
"# Lines like these beginning with '#' are to be ignored.\n"
"#\n"
"# Pointer events (mouse motion and button clicks) come in the form:\n"
"#\n"
"#\n"
"# Pointer <client#> <x> <y> <mask> <hint>\n"
"#\n"
"#\n"
"# The <client#> is a decimal integer uniquely identifying the client\n"
"# that generated the event. If it is negative that means this event\n"
"# would have been discarded since the client was viewonly.\n"
"#\n"
"# <x> and <y> are decimal integers reflecting the position on the screen\n"
"# the event took place at.\n"
"#\n"
"# <mask> is the button mask indicating the button press state, as normal\n"
"# 0 means no buttons pressed, 1 means button 1 is down 3 (11) means buttons\n"
"# 1 and 2 are down, etc.\n"
"#\n"
"# <hint> is a string containing no spaces and may be ignored.\n"
"# It contains some interpretation about what has happened.\n"
"# It can be:\n"
"#\n"
"# None (nothing to report)\n"
"# ButtonPress-N (this event will cause button-1 to be pressed) \n"
"# ButtonRelease-N (this event will cause button-1 to be released) \n"
"#\n"
"# if two more more buttons change state in one event they are listed\n"
"# separated by commas.\n"
"#\n"
"# One might parse a Pointer line with:\n"
"#\n"
"# int client, x, y, mask; char *hint;\n"
"# sscanf(line, \"Pointer %d %d %d %s\", &client, &x, &y, &mask, &hint);\n"
"#\n"
"#\n"
"# Keysym events (keyboard presses and releases) come in the form:\n"
"#\n"
"#\n"
"# Keysym <client#> <down> <keysym#> <keysym-name> <hint>\n"
"#\n"
"#\n"
"# The <client#> is as with Pointer.\n"
"#\n"
"# <down> is a decimal either 1 or 0 indicating KeyPress or KeyRelease,\n"
"# respectively.\n"
"#\n"
"# <keysym#> is a decimal integer incidating the Keysym of the event.\n"
"#\n"
"# <keysym-name> is the corresponding Keysym name.\n"
"#\n"
"# See the file /usr/include/X11/keysymdef.h for the mappings.\n"
"# You basically remove the leading 'XK_' prefix from the macro name in\n"
"# that file to get the Keysym name.\n"
"#\n"
"# One might parse a Keysym line with:\n"
"#\n"
"# int client, down, keysym; char *name, *hint;\n"
"# sscanf(line, \"Keysym %d %d %s %s\", &client, &down, &keysym, &name, &hint);\n"
"#\n"
"# The <hint> value is currently just None, KeyPress, or KeyRelease.\n"
"#\n"
"# In the future <hint> will provide a hint for the sequence of KeyCodes\n"
"# (i.e. keyboard scancodes) that x11vnc would inject to an X display to\n"
"# simulate the Keysym.\n"
"#\n"
"# You see, some Keysyms will require more than one injected Keycode to\n"
"# generate the symbol. E.g. the Keysym \"ampersand\" going down usually\n"
"# requires a Shift key going down, then the key with the \"&\" on it going\n"
"# down, and, perhaps, the Shift key going up (that is how x11vnc does it).\n"
"#\n"
"# The Keysym => Keycode(s) stuff gets pretty messy. Hopefully the Keysym\n"
"# info will be enough for most purposes (having identical keyboards on\n"
"# both sides helps).\n"
"#\n"
"# Here comes your stream. The following token will always indicate the\n"
"# end of this informational text:\n"
"# END_OF_TOP\n"
);
fflush(pipeinput_fh);
if (raw_fb_str) {
/* the pipe program may actually create the fb */
sleep(1);
}
}
int check_pipeinput(void) {
if (! pipeinput_fh) {
return 1;
}
if (ferror(pipeinput_fh)) {
rfbLog("pipeinput pipe has ferror. %p\n", pipeinput_fh);
if (pipeinput_opts && strstr(pipeinput_opts, "reopen")) {
rfbLog("restarting -pipeinput pipe...\n");
initialize_pipeinput();
if (pipeinput_fh) {
return 1;
} else {
return 0;
}
} else {
rfbLog("closing -pipeinput pipe...\n");
pclose(pipeinput_fh);
pipeinput_fh = NULL;
return 0;
}
}
return 1;
}
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